Japan Geoscience Union Meeting 2023

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[J] Oral

H (Human Geosciences ) » H-CG Complex & General

[H-CG24] Advanced life support systems with closed bio-ecosystems and thier applications

Sun. May 21, 2023 1:45 PM - 3:00 PM 202 (International Conference Hall, Makuhari Messe)

convener:Hiroshi Katoh(Advanced Science Research Promotion Center, Organization for Research Initiative and Promotion, Mie University), Masanori Shinohara(Teikyo University of Science), Tomoko Abe(School of Science and Engineering, Tokyo Denki University), Chairperson:Hiroshi Katoh(Advanced Science Research Promotion Center, Organization for Research Initiative and Promotion, Mie University), Masanori Shinohara(Teikyo University of Science), Tomoko Abe(School of Science and Engineering, Tokyo Denki University)

2:05 PM - 2:22 PM

[HCG24-02] Limitations of microbial reactions in nitrogen cycling within controlled ecosystems.

★Invited Papers

*Ryosuke Endo1 (1.Osaka Metropolitan University)

Keywords:Waste biomass, Nitrogen recycling, Space farming

Establishing sustainable food production technologies is necessary for sustaining human life in closed systems for extended periods away from Earth. Resource cycling technologies are needed to efficiently convert inorganic resources required for plant-based food production, such as nutrients and carbon dioxide, from waste biomass generated within the closed system to achieve this. The degradation of biomass and the utilization of resulting nutrients by plants through soil microorganisms are natural processes applicable to closed ecological systems in space. However, in small closed systems such as spacecraft, saving space requires achieving fast and efficient material conversion reactions. Yet, the resource recovery rate and reaction rate in microbial processing is fundamentally in trade-off relationships. Technology for completely and rapidly processing organic waste into plant nutrients still needs to be established. This presentation discusses these challenges, focusing on the nitrogen cycle in closed systems.